Can someone answer my question about how I would be detecting units of I turned off all sensors including EMCON? I wanted to try creeping in without a signature and it doesn't work. Could it be bc tutorial is scripted? Do I need to go to doctrine? I swear I have all sensors off and my unit still detects the Goblin. I am thinking it's script.
You have passive sensors that detect the emissions of another unit. For a submarine this is passive sonar that will detect the noise a submarine is making. Keep in mind that YOU have to also be very quiet. That means running at 5 knots or even less and keeping in mind the layers from the previous discussions and links. Modern submarines, both nuclear and conventional, are exceedingly quiet. Detection is difficult and mutual detection is common. Theoretically, US and UK subs should be better, but these days I think the differences are small enough that in game, how you employ them makes more difference.
For a sub this is the way you want to operate. Use your active sonar and while you'll locate the other guy, you point a big flashing red arrow right at your own location.
Open up the sensors dialog box and you'll see that you have active ones you can turn on and off, but even when off, you'll have passive sensors that will still detect. These don't radiate - they only listen.
For a surface ship it could be receivers that are searching for the electronic emissions of another ship. If the other ship is using radar, you can detect that. A surface ship also has passive sonar, hull mounted and/or towed arrays depending on the ship, to detect the noise from submarines. There is a little less concern with active sonar from a ship - the sub probably already knows where you are :-)
For the function keys, use the Fn button. Hold that and the function key (f2 for example) and it cancels the HP specific computer function (like turning on wifi, or volume or whatever) and makes the function key do what it is supposed to do as a function key. That's what the Fn key is for. If the manual says F2 for speed and depth, then you press FN+F2. Nothing to it. Most laptops are like that these days, both PC and Mac.
"When the Boogeyman goes to sleep he checks his closet for paratroopers"